很水的dp
#include <iostream>
using namespace std;
const int MAX = 505;
int dp[MAX][MAX];
int arr[MAX][MAX];
int main()
{
int n;
cin >> n;
for (int i = 0; i < n; i++)
{
for (int j = 0; j <= i; j++)
{
cin >> arr[i][j];
if (i == n-1)
dp[i][j] = arr[i][j];
}
}
for (int i = n-2; i >= 0; i--)
{
for (int j = 0; j <= i; j++)
{
dp[i][j] = max(dp[i+1][j],dp[i+1][j+1])+arr[i][j];
}
}
cout << dp[0][0] << endl;
return 0;
}